So I just had the front upper control arms and front tension rods changed out for adjustable sets and had the car aligned. Driving right out of the shop that swapped the parts, I hear popping (like something is loose) from the front tires. I take it back to the shop and he says the alignment should fix the problem as they'll tighten everything. Well after the alignment I still get the problem noise. The alignment says it may be the parts, so I call the manufacturer. Top Speed Pro 1.

They say they have no idea and have never heard of the problem with the parts and blame it on the mechanic that installed it. So I am left with three places pointing fingers. Here is a video that you hear the popping/loosing sounds.

300zx popping noise - YouTube

I just wanted to be able to adjust the camber and caster. Now, $600 later I have another problem. Do you guys have ANY idea? I'm so close to giving up but I don't want to on my Z.

 

That sucks man. Sounds like creaking metal to me, like something is moving in a way that it shouldn't be. Is the car lowered? Have any of the mechanics actually tried your car and heard the noise? Maybe the term "popping" is what's throwing them off, as sounds can be pretty subjective. And does the noise seem random or have you noticed any kind of trigger/consistencies?

 

Sound like your engine mounts are worn.